so I am definitely not going to run a low pressure just for the brakes, with all of the extra effort that entails.
And there is the point - not the brakes fault, but a setup problem - the instructions specifically state 40lbs. air. For simply running lower pressure you eliminate the constant greasing and trying to find the right grease, etc. In order to run a seperate tank, there is no effort than simply installing a tank - all of the other plumbing is the same, so it is no big project.
You should always run an extra tank for brakes - regardless of mfg., this way neither system compromises the other. You can easily have a leak on the "down" side of the retracts, and not have brakes when you land - then you will care very much, especially if it becomes a safety issue at some point.
Dennis